Thieaudio Monarch MK3 default shell front over white background
Thieaudio Monarch MK3 default shell front 3 quarter and rear over white background
Thieaudio Monarch MK3 default shell front closeup on accessory case from Bloom Audio gallery
Thieaudio Monarch MK3 Sunset Horizon finish front over white background
Thieaudio Monarch MK3 Sunset Horizon finish front with stock cable over white background
Thieaudio Monarch MK3 Butterfly finish front over white background
Thieaudio Monarch MK3 Butterfly finish front with stock cable over white background
Thieaudio Monarch MK3 Disco finish front over white background
Thieaudio Monarch MK3 Disco finish front with stock cable over white background
Thieaudio Monarch MK3 Aurora Mix finish over white background
Thieaudio Monarch MK3 Aurora Mix finish with stock cable over white background
Thieaudio Monarch MK3 Aurora Crystal finish front over white background
Thieaudio Monarch MK3 Aurora Crystal finish front with stock cable over white background
ThieAudio Monarch MK3 Aurora Pink B2
ThieAudio Monarch MK3 Aurora Blue B3
ThieAudio Monarch MK3 Black Widow C2
ThieAudio Monarch MK3 Green Glamour C3
ThieAudio Monarch MK3 Blue Buoyant C4
ThieAudio Monarch MK3 Red Romance C5
ThieAudio Monarch MK3 Deep Dungeons D1
ThieAudio Monarch MK3 Sea Vines D2
ThieAudio Monarch MK3 Red Vivid D3
ThieAudio Monarch MK3 Green Urchin D4
Thieaudio Monarch MK3 all available shell colors and finishes chart

Thieaudio Monarch MKIII | Flagship Tribrid Universal IEMs

Sale price$999.00
/

Style
Faceplate

Thieaudio new black logo

A Brilliantly Re-engineered Threequel: ThieAudio Enhances Their Tribrid Legend with the Monarch MKIII

  • 2 Dynamic drivers, 6 Balanced Armatures, and 2 Electrostatic drivers
  • Balanced Tonal Signature: The MKIII maintains a studio-monitor-esque tonal excellence while offering focused sub-bass impact
  • Enhanced Ultra-treble Output: now features Sonion's EST drivers and increased frequencies for improved staging and resolution
  • Improved Bass Quality: enjoy better quality bass without sacrificing tonal integrity with ThieAudio's IMPACT2 subwoofer innovation
  • Upgraded thicker 22AWG stock cable with modular plug design including 2.5mm, 3.5mm, and 4.4mm smart-switch plugs
  • (x6) shell colors with (x15) faceplate styles now available for a customizable finish
  • Check out our measurement of Monarch MKIII


Bloom's Take

With the Monarch MK2, ThieAudio captured the highly resolving nature and micro-detail presentation of a flagship experience and delivered them with impressive value for the money. It was easily a best-seller IEM, earned a seat at the table of Bloom Audio's "Best Bang for your Buck" IEMs, and was rated as one of the best IEMs in the world by a number of reviewers and critics.

These are extremely big shoes to fill... but ThieAudio may have done just that with the Monarch MK3.

The MK3 successfully maintains a core tuning balance and delivers an elevated level of technical performance with excellent bass extension, natural and lifelike mids, and improved treble that provides sparkle and shimmer without sibilance and stabbing. Additionally, the imaging and soundstage are a clear standout.

The packaging and accessory kit for the MK3 remains essentially the same and is largely shared across ThieAudio’s lineup. However, the stock cable has changed and is more akin to the Oracle MKII cable. And while the new default faceplate is gorgeous, one of the big draws of the MK3 is the range of customizations available with the shells and faceplates offering about 80 possible combinations making this a special IEM.

Whether or not you love the changes from the MK2, the price, performance, and design make a really compelling case for Monarch MK3 as a near-flagship quality $1000 IEM that approaches "bass-head" territory.

Read our full review here.


ThieAudio Monarch MK2 and MK3 side-by-side with stock cables on wood tray from Bloom Audio gallery

IMPACT2

IMPACT2 (“Impact Squared”) is ThieAudio's latest technological innovation to change the personalized audio industry. IMPACT2 is a new subwoofer solution consisting of (x2) 10mm composite diaphragm drivers arranged in an isobaric design. The addition of another 10mm subwoofer significantly enhances the power and texture of the bass, while the in-house isobaric chamber design keeps the frequency and pressure constant. This means you can enjoy better quality bass without sacrificing tonal integrity.

Enhanced Ultra-Treble Output

The Monarch MKIII has been updated with Sonion’s latest EST drivers and re-tuned to better exhibit their full potentials. Thanks to the new tuning strategy, the ultra-treble frequencies at +15kHz to 20kHz have been increased for a more comprehensive upper frequency extension. Compared to its predecessor, the Monarch MKIII will have a greater sense of staging, atmosphere, and an overall enhancement in perceived resolution thanks to this extension.

ThieAudio Monarch MK3 frequency response graph with Monarch MK2 comparison

Balanced Tonal Signature

At the core of the MKIII is a commitment to tonal excellence. It retains a studio-monitor like tonal signature with a focused sub-bass impact for a clean, natural, detailed sound. Engineered with a true 4-way crossover with 9 separate passive components, the Monarch MKIII stays true to its tonal legacy. Thanks to IMPACT2 , the subbass is punchier, but the mids from 200Hz to 800Hz retain their ruler-flat neutrality. This tonality of the mids mimics the true sound of studio monitors used in recording studios to deliver accurate audio reproduction.

Furthermore, the MKIII mids have been revamped to better separate respective driver ranges for maximum output while minimizing the THD. This means the mids will sound higher in resolution while retaining the same monitor-esque tonality. The treble has also been slightly re-tuned to offer more coherency throughout the region, as well as little more clarity and definition.

ThieAudio Monarch MK3 with attached stock cable on sea green folding pouch with plant from Bloom Audio gallery

Specifications

Thieaudio Monarch MKIII measurement graph

  • Drivers: Sonion EST, Knowles DWFK 31785 (x2), Sonio 28UAP (x1), IMPACT2 (x2 10mm Composite DD)
  • Crossover: 4-Way Passive with 4 Sound Bores
  • Sensitivity: 99dB @ 1kHz (+/- 1dB)
  • Driver Impedance: 20Ω
  • Frequency Response: 20Hz-40kHz
  • Cable: 4' 22AWG 6N OCC Silver-plated and Graphene Silver-plated
  • Termination: 2-pin 0.78mm with (x3) modular Smart-switch (2.5mm, 3.5mm, 4.4mm)

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Customer Reviews

Based on 21 reviews
81%
(17)
14%
(3)
5%
(1)
0%
(0)
0%
(0)
H
Hector Castro
Excellent IEMs

As expected the Monarch MKIIIs are marvelous. Everything is well balanced & they bring the artists vocals out. Has the correct amount of bass while keeping the treble and mids clear as well.They are a little bit big (probably due to the drivers)but overall they fit well in the ears.

d
dnlsmy
Best IEM I've ever tried

I love the sound, has the correct amount of bass while keeping the treble and mids clear as well. After listening to them in Japan, I knew I had to have them. I wish I could've compared them to the Origin, but since I haven't yet, these are my endgame.

J
John Hayes
Thieaudio Monarch MK3

Bloom was great to work with as always! The Monarch MK3 is one of my all time favorites. Bass, mids, treble, all of it fantastic! Highly recommended.

T
Tzu-Yang Lin

The instrument separation, layering, and soundstage is truly amazing, not to mention the punchy bass! After reading and watching a bunch of reviews praising the monarch lineup, I can say it really lived up to the hype and exceeded my expectations.

A
Albert Choi

Thieaudio Monarch MKIII | Flagship Tribrid Universal IEMs


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